$Id: Changes,v 1.40 2009-06-08 15:34:37 mike Exp $

Revision history for Perl extension Net::Z3950::Simple2ZOOM.

1.04 Mon Jun 8 16:31:57 BST 2009

• Fix off-by-one in Present handler, as suggested by Simon Jacob of the National Library of Australia.

1.03 Mon Apr 14 11:35:24 BST 2008

        Improvements to formatgrs1(), provided by Simon Jacob of the
        National Library of Australia <sjacob@nla.gov.au>:
        - The namespace prefix "x" is made available for GRS-1 record
          configuration to refer to the top-level namespace.
        - Multiple occurrences of the same XML element are now
          translated into separate occurrences of the corresponding
          GRS-1 element rather than being concatenated into a single
          value.
        Also:
        - Reporting of exception-handling is now requested by setting
          the S2Z_EXCEPTION_DEBUG environment variable to 1 (or 2 for
          extra verbosity).

1.02 Fri Nov 23 12:10:35 GMT 2007

• Use the present handler to optimise situations in which the client is requesting multiple records in a single bite: previously, the server would be hit once for each record.

1.01 Wed Sep 26 13:18:47 BST 2007

• Use Time::HiRes to instrument where time is spent. Operation timings are emitted if the module-global $TIME is set (so at present the only way to turn this on and off is by tweaking the boolean in the source code).

1.00 Fri Sep 21 15:44:50 BST 2007

• Add new "gsafd" database to test.xml. This is an OCLC SRU server that correctly implements result-set IDs and RSID searching.
• Otherwise identical to v0.94 (which was really the last of the 1.0-prerelease versions). With this version, the software is ready for public release.

0.94 Fri Sep 14 15:42:48 BST 2007

• Corrected handling of queries that include result-set references.
• Result-set reference handling is now configurable to use either a corresponding result-set reference at the back end or a re-executed query.
• Documentation of the above.

0.93 Wed Sep 12 11:04:10 BST 2007

• Correct handling of record-surrogate diagnostics provided by ZOOM-C (when YAZ version 3.0.12 or better is available).

0.92 Mon Sep 10 18:43:59 BST 2007

• Pass username/password tokens through into ZOOM-C.
• Support for translating result-set IDs in Type-1 queries.
• Initial searches do not fetch any records (presentChunk is set to 0) so that subsequent records fetches, when the client's fetch request has arrived and so the required schema is known, do not get bad cache-hits.
• Request MARCXML schema if client wants USMARC records.
• Correct handling of completeness attributes.
• Handle BIB-1 relation attributes.
• Correctly generate and recognise cql.resultSetId for result-set references, rather than cql.resultSet as before.
• Detect, parse, translate and report surrogate diagnostic records.
• Configurable schema handling: each database may nominate a set of Z39.50 schema OIDs which, if requested, cause a particular SRU schema to be requested from the back-end, and the resulting records translated into the appropriate MARC format. NOTE that in its current form this only works for the specific though common combination of Z39.50 front-end, SRU back-end and MARC record syntax.

0.91 Sat Sep 1 10:38:21 BST 2007

• Support for CCL queries added to the YAZ GFS, therefore to SimpleServer, therefore to Simple2ZOOM. Requires YAZ version 3.0.9 or later.
• Added new files to etc directory to configure CCL support: yazgfs.xml is a YAZ GFS configuration file, and ccl-qualifiers maps qualifiers to BIB-1 attributes.
• Support for the Scan service.
• Support translation of truncation attributes 101 (process # in search term) and 104 (Z39.58) into CQL. (Only partial in the latter case since CQL wildcards have no equivalent of /ana?4titan/.)
• Support for the Delete Result Set service -- sort of. Since SRU in fact has no analogous service, all the gateway can do is accept Delete requests and quietly no-op.
• Configurable HTTP-based authentication.
• Add a trivial sample authenticator script, etc/sru-auth
• Add etc/README to describe the increasing number of files in that directory.
• Support for the Sort service, subject to several provisos, the most important being that due to limitations in ZOOM-C (as of YAZ 3.0.10), sorting no-ops against SRU 1.1 back-ends. It works correctly against both Z39.50 and SRU 1.2 back-ends.
• Support for the SUTRS record syntax.
• Support for the MARC record syntax.
• Simple support for the GRS-1 record syntax.

0.90 Fri Aug 10 23:26:00 BST 2007

      (INITIAL RELEASE of 10th August 2007 -- 1.0 pre-release)
          Basic Z39.50/SRU Gateway implementing connection management
          and the Init, Search and Present services, including Type-1
          to CQL query translation, and XML to Z39.50 response record
          translation.  NOT INCLUDED IN THIS RELEASE although is was
          scheduled to be: handling CCL queries by translation into
          CQL.

0.10 Fri Jul 6 16:59:47 BST 2007

• Functionally equivalent to the old code, but now packaged in a CPAN-friendly way. Version number bumped to 0.10 in this initial "null release" to match the version number 0.1 in the pre-framework code, which has been distributed to some customers, since the functionality is identical.

0.01 Fri Jul 6 16:12:13 2007

• original version; created by h2xs 1.23 with options

  -X --name=Net::Z3950::Simple2ZOOM --compat-version=5.8.0 --omit-constant --skip-exporter --skip-ppport

  (The core code is rather older than this, and goes back at least to Seb's CVS revision 1.1 of the main script, checked in on 31st March 2006. The date above marks the first version to be Perl-module packaged, as a step towards making a public release.)